There will be no implementation of the Iran nuclear deal unless an investigation into previous nuclear activity is stopped, a new report indicates.

A top Iranian security official declared that the nuclear deal signed in July between the Islamic Republic and the P5+1 nations will not be implemented if the International Atomic Energy Agency (IAEA), the UN’s nuclear watchdog continues looking into its history of nuclear development, according to an AFP report.

Admiral Ali Shamkhani, secretary of Iran’s Supreme National Security Council, said on Sunday that anything short of closing the investigation would be unacceptable, the report says.

In October, former Iranian President Akbar Hashemi Rafsanjani seemingly acknowledged in an interview with the Islamic Republic News Agency (IRNA), Iran’s official media outlet, that Tehran has been pursuing the bomb since it began its nuclear development program in the 1980s.

Rafsanjani, who was president from August 1989 until August 1997, reportedly conceded in the Arab-language interview last month that “from the onset, there has been a comprehensive clandestine nuclear plan, including construction of secret sites, enrichment of uranium, manufacture of centrifuge parts, laser technology, and the heavy water reactor.”

Iran granted the IAEA access to the Parchin military site , about 19 km southeast of the capital, in September. According to a Fox News report, however, Iran had attempted to “sanitize” the sensitive site ahead of the visit.

IAEA Director-General Yukiya Amano, following his visit to Tehran in September, confirmed that renovations had taken place at Parchin and that equipment was missing, but provided no further details.

There were also “strong indications” that Iran had already violated UN Security Council resolutions related to ballistic missiles when it test-fired a new missile in October, White House Press Secretary Josh Earnest acknowledged at the time.

By: United with Israel Staff